import Vue from 'vue'
import VueRouter from 'vue-router'

// import Login from '../components/Login.vue'
const Login = () => import(/* webpackChunkName: "login_home_welcome" */ '../components/Login.vue')
// import Home from '../components/Home.vue'
const Home = () => import(/* webpackChunkName: "login_home_welcome" */ '../components/Home.vue')
// import Welcome from '../components/Welcome.vue'
const Welcome = () => import(/* webpackChunkName: "login_home_welcome" */ '../components/Welcome.vue')

// import Users from '../components/user/Users.vue'
const Users = () => import(/* webpackChunkName: "users_rignts_roles" */ '../components/user/Users.vue')
// import Rights from '../components/power/Rights.vue'
const Rights = () => import(/* webpackChunkName: "users_rignts_roles" */ '../components/power/Rights.vue')
// import Roles from '../components/power/Roles.vue'
const Roles = () => import(/* webpackChunkName: "users_rignts_roles" */ '../components/power/Roles.vue')

// import Cate from '../components/goods/Cate.vue'
const Cate = () => import(/* webpackChunkName: "cate_params" */ '../components/goods/Cate.vue')
// import Params from '../components/goods/Params.vue'
const Params = () => import(/* webpackChunkName: "cate_params" */ '../components/goods/Params.vue')

// import List from '../components/goods/List.vue'
const List = () => import(/* webpackChunkName: "list_add" */ '../components/goods/List.vue')
// import Add from '../components/goods/Add.vue'
const Add = () => import(/* webpackChunkName: "list_add" */ '../components/goods/Add.vue')

// import Order from '../components/order/Order'
const Order = () => import(/* webpackChunkName: "order_report" */ '../components/order/Order.vue')
// import Report from '../components/report/Report'
const Report = () => import(/* webpackChunkName: "order_report" */ '../components/report/Report')

Vue.use(VueRouter)

const router = new VueRouter({
  routes: [
    // 使用路由重定向，使用户写下 '/' 时，自动跳转到登录页面
    {
      path: '/',
      redirect: '/login'
    },
    {
      path: '/login',
      component: Login
    },
    {
      path: '/home',
      component: Home,
      // 路由重定向,用户一进入 '/home' ,就转到 '/welcome'
      redirect: '/welcome',
      children: [
        {
          path: '/welcome',
          component: Welcome
        },
        {
          path: '/users',
          component: Users
        },
        {
          path: '/rights',
          component: Rights
        },
        {
          path: '/roles',
          component: Roles
        },
        {
          path: '/categories',
          component: Cate
        },
        {
          path: '/params',
          component: Params
        },
        {
          path: '/goods',
          component: List
        },
        {
          path: '/goods/add',
          component: Add
        },
        {
          path: '/orders',
          component: Order
        },
        {
          path: '/reports',
          component: Report
        }
      ]
    }
  ]
})

// 挂载路由守卫
router.beforeEach((to, from, next) => {
  // to 表示将要访问的路径
  // from 表示从那个路径跳转而来
  // next() 是一个函数,表示放行(即允许跳转到下一个页面)
  // next()  放行        next('login')  强制跳转
  if (to.path === '/login') return next()
  // 获取 token
  const token = window.sessionStorage.getItem('token')
  if (!token) return next('/login')
  next()
})

export default router
